Dataset Information

Investigation of complement activation product c4d as a diagnostic and prognostic biomarker for lung cancer.

ABSTRACT:

Background

There is a medical need for diagnostic biomarkers in lung cancer. We evaluated the diagnostic performance of complement activation fragments.

Methods

We assessed complement activation in four bronchial epithelial and seven lung cancer cell lines. C4d, a degradation product of complement activation, was determined in 90 primary lung tumors; bronchoalveolar lavage supernatants from patients with lung cancer (n = 50) and nonmalignant respiratory diseases (n = 22); and plasma samples from advanced (n = 50) and early lung cancer patients (n = 84) subjects with inflammatory lung diseases (n = 133), and asymptomatic individuals enrolled in a lung cancer computed tomography screening program (n = 190). Two-sided P values were calculated by Mann-Whitney U test.

Results

Lung cancer cells activated the classical complement pathway mediated by C1q binding that was inhibited by phosphomonoesters. Survival was decreased in patients with high C4d deposition in tumors (hazard ratio [HR] = 3.06; 95% confidence interval [CI] = 1.18 to 7.91). C4d levels were increased in bronchoalveolar lavage fluid from lung cancer patients compared with patients with nonmalignant respiratory diseases (0.61 ± 0.87 vs 0.16 ± 0.11 µg/mL; P < .001). C4d levels in plasma samples from lung cancer patients at both advanced and early stages were also increased compared with control subjects (4.13 ± 2.02 vs 1.86 ± 0.95 µg/mL, P < 0.001; 3.18 ± 3.20 vs 1.13 ± 0.69 µg/mL, P < .001, respectively). C4d plasma levels were associated with shorter survival in patients at advanced (HR = 1.59; 95% CI = 0.97 to 2.60) and early stages (HR = 5.57; 95% CI = 1.60 to 19.39). Plasma C4d levels were reduced after surgical removal of lung tumors (P < .001) and were associated with increased lung cancer risk in asymptomatic individuals with (n = 32) or without lung cancer (n = 158) (odds ratio = 4.38; 95% CI = 1.61 to 11.93).

Conclusions

Complement fragment C4d may serve as a biomarker for early diagnosis and prognosis of lung cancer.

SUBMITTER: Ajona D

PROVIDER: S-EPMC3776260 | biostudies-literature | 2013 Sep

REPOSITORIES: biostudies-literature

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Investigation of complement activation product c4d as a diagnostic and prognostic biomarker for lung cancer.

Ajona Daniel D Pajares María J MJ Corrales Leticia L Perez-Gracia Jose L JL Agorreta Jackeline J Lozano Maria D MD Torre Wenceslao W Massion Pierre P PP de-Torres Juan P JP Jantus-Lewintre Eloisa E Camps Carlos C Zulueta Javier J JJ Montuenga Luis M LM Pio Ruben R

Journal of the National Cancer Institute 20130812 18

<h4>Background</h4>There is a medical need for diagnostic biomarkers in lung cancer. We evaluated the diagnostic performance of complement activation fragments.<h4>Methods</h4>We assessed complement activation in four bronchial epithelial and seven lung cancer cell lines. C4d, a degradation product of complement activation, was determined in 90 primary lung tumors; bronchoalveolar lavage supernatants from patients with lung cancer (n = 50) and nonmalignant respiratory diseases (n = 22); and plas ...[more]

PMID: 23940286

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Dataset Information

Investigation of complement activation product c4d as a diagnostic and prognostic biomarker for lung cancer.

Background

Methods

Results

Conclusions

Publications

Investigation of complement activation product c4d as a diagnostic and prognostic biomarker for lung cancer.

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